Elastic-plastic behaviors of vertically aligned carbon nanotube arrays by large-displacement indentation test

Y. Charles Lu, Johnson Joseph, Qiuhong Zhang, Feng Du, Liming Dai

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

This chapter describes the large-displacement indentation test method for examining elastic-plastic behaviors of vertically aligned carbon nanotube arrays (VA-CNTs). The principle of this test is explained by using a cavity expansion model. The experiments have been performed on VA-CNTs synthesized by the chemical vapor deposition (CVD) method. Under a cylindrical, flat indenter, the VA-CNTs exhibit two distinct deformation stages: a short, elastic deformation at small displacement and a plateau-like, plastic deformation at large displacement. The critical indentation stress, a measure of yield stress or collapsing stress of the VA-CNT arrays, has been obtained. The deformation mechanism of the VA-CNTs at large displacement is revealed with scanning electronic microscope (SEM) images of the deformed VA-CNTs and finite element simulations.

Original languageEnglish
Title of host publicationNanomechanical Analysis Nanomechanical Analysis Materials
Pages323-339
Number of pages17
DOIs
StatePublished - 2014

Publication series

NameSolid Mechanics and its Applications
Volume203
ISSN (Print)0925-0042

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science (all)

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